Wrench



Feb. 13 19 23,

'A- S. FISHER I j WRE Filed June 23 1920 raamearet. 13,1923.

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" E UNITED, STATES PATENT OFFICE.

. ANDREW s. irisrrnn, on nn'roonA, rnnnsrnvanm.

' WRENCH.

Application filed June 9.2, 1920. Serial No. 390,694.

. To all whom it may concerni j Beit known thatlgAnnnnw S. Frsnnn,

, citizen of the United States, residing at Al- 'toona, in the county ofBlair and State of,

stantially conform to the minimum span of theotherpair of jaws so thatapractically continuousrange of adjustment will be had up .to themaximumspan of the largest, pair ,ofjaws. i

And the invention has as a stillfurther object to provide a wrenchwherein thej aw members will 'be slidably connected by an adjustingelement therefor and wherein the pair of jaws at either end of thewrench may be moved toward each other and forcibly urged into engagementwith a nut by simply shifting said member forwardlytoward the end of thewrench engaged with the work.

Other and incidentalobjects will appear hereinafter. Y i h 1 In thedrawings:

Figure 1 is a front perspective View 'of my improved wrench, I

vice,

' Figure 3 1s a the adjusting element of the wrench in detail, and y jFigure 5 is a fragmentary plan view showing the manner in which the,wedge shaped studs of the adjustingelement 5 are adapted to coact withthe walls of the slots of the jaw members. i j

In car ng the invention into efi'ect, Iemploy companion jaw members 10and 11 respectively: Thesejaw members are in the nature of fiat platesand are formed at their ends with slightly ofiset jaws, the jaws atcorrespondingends of the plates mating so that a pair of jaws12 isprovided at one end of the wrench and a pair of jaws 13 at the oppositeend of the wrench. As will be observed, the parallel working faces of'thel Figure'Q isan edge elevation of the derear elevation of thewrenoh,

"Figure 4 is a perspective view showing an adjusting element 19therefor.

jaws 19 are directed obliquely in onedirection with respect to thelongitudinal axis of the wrench while the parallel working iaces of thejaws 13 are directed obliquely n the opposite direction, one pair ofjaws being shown 1n the present lnstance as formed to receive ahexagonalnut (while the other pair is shown as formed to receive a square nut, Asonce maybe varied as desired, it being contemplated that the jaws may,within the spirit 1 oi? theinvention, be varlously formed, as, forinstance, to provide an alligator wrench. At their outerends, the. jawsof the member 10 are formed with raised thickened portions 14 lyingflushwith the upperIfaces of the jaws of the member 11 while at the outerends of the jaws of this latter memberare formed depending thickenedportions 15 ly ,ing flushwith the lower faces of the jaws of the member10., As-particularlyshown will be at appreciated, this structural detailin Figures 1 and 3 of thepdrawings, the

thickened'portions are formed at their inner transverse edges withoblique undercut shoulders 16 while at thebases of the jaws thej awmembers are formed with beveled shoulders mating with the firstshoulders. As will be appreciated, these shoulders will tend to preventseparation of the jaws at right angles to the plane thereof. Formed inthe jaw member 10 near opposite ends thereof is a pair ofobliquelydire'cted slots 17 and formed in the jaw m emb er fl1 is a:pair of similar slots 18 incllnlng in a direction opposite to andintersecting the first slots. a j 1 V Slidably connecting thejawinembers is .This ad j usting element comprises' a body plate which,as shown in Figures 1 and 2, rests flat against the-j aw member 11 atthe uppers de of the wrench and is medially provided with laterallydirected lugs or ears 2O which as best shown *in Figure 3,, overhang theaw members. Upstanding from the plate near its ends are oppositelydirected wedge shaped studs, 21 which: are freely recelved through theintersecting slots 17 and 18 of the jaw members and threaded. upon theupper ends'of said studs arenuts 22 slidably connecting the jaw memberswith each other as well as'also slidably connecting the adjustingelement with said members.

Attention is now directed to the fact, as

particularly brought out in Figure 5, that in practical use.

the sloping faces of the studs 21 will coact with the converging wallsof the slots of the jaw members for sliding these members one upon theother when the adjusting element is shifted longitudinally of the jawmembers.

Consequently, in the practical use of the.

justing element the bindinga'ction of the aws against the nut will beincreasedproportionately so thatthe awe may be caused to securely gripthe nut and thus obviate slipping. Due to the wedge shape of the studs,an elongated bearing area is provided between said studs and the wallsof the slots 17 and 18 so that mutilation of said walls will be obviatedwhile, at the same time, e3;- treme wedging force tending to move thejaw members inwardly upon each other may be brought to bear upon saidmembers. As will be perceived, closing of the jaws 12 will serve to openthe jaws 13'and vice versa closing ofthe jaws 13 wid serve to open thejaws 12. The jaws 13 are somewhat larger than the jaws 12, the jaws 12being designed, of course' for light work while the jaws 13 are intendedfor heavy work. Pref erably; the wrench is so constructed that the 1maximum span of the jaws 12 is, as shown in Figure 8, substantiallyequal to the minimum span of the jaws 13. By this arrangement acontinuous range of adjustment is had from the minimum spanoi": the jaws12 up to the maximum span of the other pair of jaws. I accordinglyprovide a highly eflicient wrench structure and a wrench which will'befound particularly serviceable Having thus'descri-bed the invention,what is claimed as new is:

1. A wrench including companion jaw members havlng enacting aws, and anadjusting element at the outer side of one of separation at right anglesto the jaws, and

shifting the members transversely and movv ing the jaws relative to eachother.

3. A wrench including companion v jawmembers having coacting jaws, oneof the j aws being formed with a thickenedportion having a shoulder andthe other of the jaws having a shoulder at its base coacting with thefirst shoulder for securing the against separation at right anglesv tothe plane thereof, and an adjusting element at the outer side of oneofthe members slidahly connecting the member-sand movable longitudinallythereof forshii'ting the members transversely and moving the jaws-'relative to each other. g

4:. A wrench including companion jaw members having coacting jaws, and alongitudinally extending adjusting element at the outer side of one ofthemembers slidably connecting the members and movable longitudinallythereof for shifting the members transversely and moving thev jawsrelative to each other, said element having means overhanging the sideedges of one of said members whereby when manipulating the wrench saidmeans may be grasped for shitting the jaws. j V

5. A Wrench includingcompanion jaw members havingcoaicting jawsandrprovided with intersecting oblique slots, and an adjusting elementslidably, connecting the members and having wedge shaped studsprojecting through said slots, saidstuds having fiat sides forminginclined fiat bearing surfaces coa'cting with the oblique walls of saidslots whereby. said element may. be shifted longitudinally of themembers for moving the aws relative to each other.

6. A wrench including, companion jaw members having coasting j aws;and-a longitudinally extending adjusting element 'at the outer side ofone of the members slidabl'y connecting the members and movablelongitudinally thereof fo-rfshiftingthe members transversely and movingthe jaws relative to each other, said element having ears overhangingtheside edges of one of-saidmem- 'bers at a point between the endsthereot whereby when manipulating the wrench said ears may be graspedfor shiiiing jaws. j

y In testimony whereof I afiix my s gnature.

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